_Recent Modifications in the Organization._ Further slight modifications in the organization, as established in 1905, were made since that date. Before 1908 all the work of the Forests was supervised from the main office in Washington and this arrangement caused much delay and inconvenience in carrying on the business of the Forests. In the fall of 1908 six administrative districts were established, to which another was added in 1914. By this arrangement the National Forests are divided into 7 groups and each group has a district headquarters in a large city or town centrally located in the group. The District Office acts as sort of clearing house for all National Forest business. All matters in the administration and protection of the National Forests that cannot be settled on the Forest or appear to be of general importance to the district are taken to the District Office, which is in charge of a District Forester and several assistants. Beginning in 1909 Forest Experiment Stations were established in each district and in 1910 the Forest Products Laboratory, the first one of its kind in the world, was formally opened at Madison, Wisconsin. The Weeks Law, passed on March 1, 1911, provides for the acquisition of forest lands on the watersheds of navigable streams in the Appalachian and White Mountains. Up to June 30, 1917, over 1,500,000 acres have been approved for purchase in these mountains. The Pisgah National Forest in North Carolina was recently organized from purchased lands. THE PRESENT ORGANIZATION OF THE FOREST SERVICE _The Administrative Districts._ The administration of the National Forests and the conduct of all matters relating to forestry which have been placed upon the Department of Agriculture are in charge of the Forester whose office is in Washington, D. C. To facilitate the administration of the Forests 7 districts have been established with headquarters in the following places: District 1. (Montana, northeastern Washington, northern Idaho, and northwestern South Dakota) Missoula, Montana. District 2. (Colorado, Wyoming, the remainder of South Dakota, Nebraska, northern Michigan, and northern Minnesota) Denver, Colorado. District 3. (Most of Arizona and New Mexico) Albuquerque, New Mexico. District 4. (Utah, southern Idaho, western Wyoming, eastern and central Nevada, and northwestern Arizona) Ogden, Utah. District 5. (California and western Nevada) San Francisco, California. District 6. (Washington, Oregon, and Alaska) Portland, Oregon. District 7. (Arkansas, Florida, Oklahoma, and the newly purchased areas in South Carolina, Georgia, North Carolina, Tennessee, Virginia, West Virginia, New Hampshire, Maine, and Alabama,) Washington, D. C.